mirror of
https://github.com/MobileGL-Dev/MobileGL
synced 2026-09-08 20:28:32 +09:00
133 lines
4.3 KiB
C++
133 lines
4.3 KiB
C++
// MobileGL - MobileGL/MG_Util/Metrics/BufferMetrics.cpp
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// Copyright (c) 2025-2026 MobileGL-Dev
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// Licensed under the GNU Lesser General Public License v3.0:
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// https://www.gnu.org/licenses/gpl-3.0.txt
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// https://www.gnu.org/licenses/lgpl-3.0.txt
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// SPDX-License-Identifier: LGPL-3.0-only
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// End of Source File Header
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#include "BufferMetrics.h"
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namespace MobileGL {
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namespace MG_Util {
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Uint32 FixedRestartIndexForGLType(GLenum indexType) {
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switch (indexType) {
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case GL_UNSIGNED_BYTE: return 0xFFu;
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case GL_UNSIGNED_SHORT: return 0xFFFFu;
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case GL_UNSIGNED_INT: return 0xFFFFFFFFu;
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default: return 0;
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}
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}
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SizeT GetGLTypeSize(GLenum type) {
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switch (type) {
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// Scalars
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case GL_BYTE:
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case GL_UNSIGNED_BYTE:
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case GL_UNSIGNED_BYTE_3_3_2:
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return 1;
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case GL_SHORT:
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case GL_UNSIGNED_SHORT:
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case GL_HALF_FLOAT:
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case GL_UNSIGNED_SHORT_5_6_5:
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case GL_UNSIGNED_SHORT_4_4_4_4:
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case GL_UNSIGNED_SHORT_5_5_5_1:
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return 2;
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case GL_BOOL:
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case GL_INT:
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case GL_UNSIGNED_INT:
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case GL_FLOAT:
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case GL_FIXED:
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case GL_INT_2_10_10_10_REV:
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case GL_UNSIGNED_INT_2_10_10_10_REV:
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case GL_UNSIGNED_INT_10F_11F_11F_REV:
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case GL_UNSIGNED_INT_5_9_9_9_REV:
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return 4;
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case GL_DOUBLE:
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#ifdef GL_ARB_gpu_shader_int64
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case GL_UNSIGNED_INT64_ARB:
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case GL_INT64_ARB:
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#endif
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return 8;
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// ---- Vector Types ----
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// 2-component vec
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case GL_FLOAT_VEC2:
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case GL_INT_VEC2:
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case GL_UNSIGNED_INT_VEC2:
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case GL_BOOL_VEC2:
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return 2 * sizeof(GLfloat); // GL_BOOL_VEC2 is also 2 * 4 bytes
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case GL_DOUBLE_VEC2:
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return 2 * sizeof(GLdouble);
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// 3-component vec
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case GL_FLOAT_VEC3:
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case GL_INT_VEC3:
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case GL_UNSIGNED_INT_VEC3:
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case GL_BOOL_VEC3:
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return 3 * sizeof(GLfloat);
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case GL_DOUBLE_VEC3:
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return 3 * sizeof(GLdouble);
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// 4-component vec
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case GL_FLOAT_VEC4:
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case GL_INT_VEC4:
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case GL_UNSIGNED_INT_VEC4:
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case GL_BOOL_VEC4:
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return 4 * sizeof(GLfloat);
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case GL_DOUBLE_VEC4:
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return 4 * sizeof(GLdouble);
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// ---- Matrix Types ----
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// Double non-square
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case GL_FLOAT_MAT2:
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return 2 * 2 * sizeof(GLfloat);
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case GL_FLOAT_MAT3:
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return 3 * 3 * sizeof(GLfloat);
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case GL_FLOAT_MAT4:
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return 4 * 4 * sizeof(GLfloat);
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// Float non-square
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case GL_FLOAT_MAT2x3:
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return 2 * 3 * sizeof(GLfloat);
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case GL_FLOAT_MAT2x4:
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return 2 * 4 * sizeof(GLfloat);
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case GL_FLOAT_MAT3x2:
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return 3 * 2 * sizeof(GLfloat);
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case GL_FLOAT_MAT3x4:
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return 3 * 4 * sizeof(GLfloat);
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case GL_FLOAT_MAT4x2:
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return 4 * 2 * sizeof(GLfloat);
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case GL_FLOAT_MAT4x3:
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return 4 * 3 * sizeof(GLfloat);
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// Double mat
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case GL_DOUBLE_MAT2:
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return 2 * 2 * sizeof(GLdouble);
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case GL_DOUBLE_MAT3:
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return 3 * 3 * sizeof(GLdouble);
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case GL_DOUBLE_MAT4:
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return 4 * 4 * sizeof(GLdouble);
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// Double non-square
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case GL_DOUBLE_MAT2x3:
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return 2 * 3 * sizeof(GLdouble);
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case GL_DOUBLE_MAT2x4:
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return 2 * 4 * sizeof(GLdouble);
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case GL_DOUBLE_MAT3x2:
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return 3 * 2 * sizeof(GLdouble);
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case GL_DOUBLE_MAT3x4:
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return 3 * 4 * sizeof(GLdouble);
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case GL_DOUBLE_MAT4x2:
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return 4 * 2 * sizeof(GLdouble);
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case GL_DOUBLE_MAT4x3:
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return 4 * 3 * sizeof(GLdouble);
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default:
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MOBILEGL_ASSERT(false, "Unknown GL Type!");
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return -1;
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}
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}
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} // namespace MG_Util
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} // namespace MobileGL
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